LBA-ECO LC-02 Tributary Coordinates, Acre River, Tri-national River Basin: 2003-2004

This data set provides coordinates for points at the mouth of tributaries of the Acre River in the Tri-national River Basin in South America. Three Global Positioning System (GPS) readings were made at the outlet of each tributary and the average of the three readings is reported.

The Tri-national River Basin is located in the tri-national frontier region of Madre de Dios, Peru, Acre, Brazil, and Pando, Bolivia (known as the MAP region). The MAP region is approximately 300,000 km2. The Acre River flows through Brazil, Bolivia, and Peru. Data on the basin drainage network from the Digital Elevation Model (DEM) Shuttle Radar Topography Mission (SRTM) was obtained as a source of information for the border areas. The GPS readings were part of an assessment of the reliability of the DEM/SRTM drainage network data (Maldonado and Brown, 2003).

There is one data file in comma-delimited (.csv) format and one compamion file (.pdf) with this data set.

DATA QUALITY STATEMENT: This data set provides GPS coordinates only and is not associated with any additional measurements. There is no associated research documentation.

本数据集提供了南美洲三国河流流域内阿克河（Acre River）支流河口点位的坐标数据。在每条支流的河口处开展了三次全球定位系统（Global Positioning System, GPS）观测，并以三次观测结果的平均值作为最终上报值。

该三国河流流域位于秘鲁马德雷德迪奥斯（Madre de Dios）、巴西阿克里（Acre）与玻利维亚潘多（Pando）的三国交界地带（亦称MAP区域），总面积约30万平方千米。阿克河干流流经巴西、玻利维亚与秘鲁三国。本数据集以航天飞机雷达地形测绘任务（Shuttle Radar Topography Mission, SRTM）生成的数字高程模型（Digital Elevation Model, DEM）所提取的流域水系网络数据作为边境区域的信息来源。本次GPS观测是针对DEM/SRTM水系网络数据可靠性开展评估工作的组成部分（Maldonado与Brown, 2003）。

本数据集包含1个逗号分隔值（comma-delimited, .csv）格式数据文件与1份配套的.pdf格式文档。

数据质量说明：本数据集仅提供GPS坐标信息，未附带任何额外测量数据，亦无相关研究文档。